Keune Miracle Elixir Concentrated Keratin Booster 15 x 2 ml. Combine Keune Miracle Elixir Concentrated Keratin Booster with a Keune Care hair mask specifically designed to address your client’s unique hair concern. After the treatment, they’ll enjoy hair that’s healthier, softer and shinier than ever before. The results are in for this keratin-based hair mask booster: Reduces internal hair damage up to 80% Makes hair twice as soft after just a single application!